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【简答题】
ZPW-2000A型无绝缘移频自动闭塞发送器的作用是什么？
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【单选题】#00330038003000301585065697105请问“男”更适合放在哪个变量中？
A.
a
B.
address
C.
sex
D.
num
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A.
address
B.
num
C.
a
D.
sex
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